Loose-leaf type transparent casing for advertising materials



March 10, 1959 w. w. HOLES 2,876,572

LOOSE-LEAF TYPE TRANSPARENT CASING FOR ADVERTISING MATERIALS Filed Feb. 25. 1957 INVENTOR.

LOOSE-LEAF TYPE TRANSPARENT CASING FOR ADVERTISING MATERIALS Wilbur W. Holes, St. Cloud, Minn.

Application February 25, 1957, Serial No. 641,894

Claims. (Cl. 40-158) This invention relates to a binding for multiple-leaves of loose leaf books and the like, and more particularly United States Patent relates to a binding for a loose leaf type transparent casing for holding and displaying advertising material, photographs, and the like. 1

An object of my invention is to provide a new and improved binding of extremely simple and inexpensive construction and operation for securing together multipleleaves of books.

Another object of my invention is the provision of a novel binding for a multiple leaf wherein only a simple and inexpensive type gummed strip is employed for holding the sheets'together. I

A further object of my invention is to provide an .improved binding for a multi-sheet transparent casing constructed of acetate and wherein the edges of the acetate sheets are interlocked with a multiplicity of glue nodules provided by an inexpensive gummed binding tape.

7 A still further object of my invention is the provision of a novel and improved leaf construction wherein the acetate transparent protective sheets are secured together and secured to a binding strip adapted for fastening into a book by means of an extremely inexpensive adhesive cooperating with a backing for the acetate sheets which is readily adherable to the adhesive to produce interlocking with the acetate sheet for securely holding the same in predetermined relation with the binding strip.

These and other objects and advantages of my invention will more fully appear from the following description made in connection with the accompanying drawings wherein like reference characters refer to the same parts throughout the several views and in which:

Fig. 1 is a plan view of the leaf construction and having a portion of the binding strip broken away for clarity;

Fig. 2 is a greatly enlarged detail transverse section view taken substantially at 2-2 in Fig. 1;

Fig. 3 is a greatly enlarged detail section view taken at 3-3 in Fig. 1; and

Fig. 4 is a greatly enlarged fractional plan view of an edge portion of the transparent acetate sheet.

One form of the present invention is shown in the accompanying figures and is described herein. The construction shown comprises generally a transparent casing or cover indicated in general by the numeral which is to comprise a leaf for a. loose leaf book. The casing 10 is constructed of a single enlarged piece of thin transparent acetate indicated in general by numeral 11 which is folded back upon itself at 12, which is the outer edge portion of the leaf construction, and to thereby define outer protective or enclosing transparent sheets 13 and 14. The top and bottom edges 15 of the integral sheets 13 and 14 are free from each other to facilitate insertion of photographs, advertising displays and the like thereinto.

The casing or leaf construction 10 also includes a thin backing sheet 16 which is preferably opaque and which is constructed of a material readily adherable to an adhesive. In the form shown, the backing sheet is preferably conice structed of a fibrous paper material such as a lightweight paper board. The'backing sheet 16 is disposed between the transparent sheets 13 and 14 of the integral cover 11 and has its outer edge disposed in close proximity with the fold at 12. The inner edge portions 13:: and 14a respectively of the outer transparent sheets 13 and 14, and the inner edge portion 16a of the backing sheet 16 are arranged in substantial registration with each other. As best seen in Fig. 2 the inner edges are all in alignment with each other.

The inner edges 13:: and 14a of the transparent sheets are provided with a plurality of apertures 17 't'herealong. It will be particularly noted that each of the apertures 17 has a restricted or diminished outer portion 17a adja cent the edge of the acetate sheet, and also has an em larged inner portion 171:. In the form shown it should be particularly noted thatthe apertures 17 intersect the inner edge of the acetate sheets and thereby define a diminished throat portion substantially at 17a. The apertures 17 define a plurality of projections or points 18 at the opposite sides of the diminished throat portion of the aperture to provide interlocking as hereinafter set forth.

Means are provided for securing the inner edges of the acetate sheets 13 and 14 together and in the form' shown, such means include elongated binding strips 19 which may be constructed of a flexible kraft board or paper material and which has a pair of opposite side portions 19a and 1% which are respectively wrapped around the inner edge portions of the outer transparent sheets 13 and 14 in overlying relation with the apertures 17 therein. The binding strip 19-is provided with means for attaching the same into a loose leaf book construction and in the form shown, such means comprise a pair of wire ringforming staples 20a which receive tapes of a loose leaf book construction when the page 10 is inserted into the book. The strip 19 has a film or layer 20 of inexpensive adhesive or glue on the inner surface thereof. The back ing sheet 16 is securely-bonded to the glue 20 through the apertures 17 in the edges of the acetate sheets and the opposite side portions 19a of the strip 19 are thereby ad-- hesively secured to the backing sheet 16 and are secured together for binding the acetate sheets 13 and'14.

It is believed important to note here that the acetate material from which the casing 11 is constructed, is extremely smooth and substantially nonporous, and although some expensive type adhesive, such as pressure sensitive adhesive will produce a secure bonding relation with the acetate, other types of more inexpensive type adhesives will not produce a bonding relation with the acetate material. However, as depicted in Figure 2, the adhesivelayer 20 at least engages the edge portion of the acetate sheets 13 and 14 and may produce some bonding effect.

It is emphasized that the edge portion 16a of the back ing 16 and the adhesive on the inner surface of the strip 19 cooperatively define a securing media for holding the opposite side portions 1% and 19b of the strip 19 together and in interlocking relation with the apertured edge portions of the acetate sheets. In this regard it should be noted that the acetate material is somewhat thinner than the backing 16 and a secure bonding relation may be had between the strip 19 and backing 16. It should further be noted that the adhesive produces a plurality of substantially integral nodules as indicated substantially at 21 projecting through the apertures 17 in the acetate sheets and in securely binding relation with the strip 19 and backing 16.

Because the acetate sheets are provided with the converging projections 18 adjacent each of the apertures, the acetate sheets will interlock around the nodules 21 which project through "each of the apertures and will pro duce a strong interlocking relation with the backing sheet 16 and the securing strip 19. The acetate sheets will thereby be held in predetermined stationary position with respect to the backing sheet 16 and strip 19 so as to be well adapted for securing into a loose: leaf book construction.

The arrangement of the apertures 17 wherein they intersect the edges of the acetate sheets is emphasized. It should be understood that because the apertures intersect the edges, the largest possible gluing area of the backing 16 is exposed through these apertures to the securing strip 19 in the adhesive thereon but the apertures are entirely confined beneath the securing strip 19. It will be seen that I have provided a new and improved transparent construction wherein the outer acetate sheets which may-be formed integrally may be interconnected at their inner edges in interlocking relation in the binding strip readily adapted for attachment into a loose leaf type book construction.

It will be further observed that I have provided in my transparent casing for displaying photographs, advertising material, and the like, an improved binding wherein an extremely inexpensive gummed strip or tape may be employed for securing the edges of theacetate sheets together and producing a mechanical interlocking arrangement whereby the acetate sheets are securely held together and to the binding-tape in order to be attached into a book construction and in order to properly hold the advertising materials or photographs therebetween. It will, of course, be understood-that various changes may be made in the form, detail, arrangement and pro portion of the parts without departing from thescope of my invention which consists of the matter described herein and set forth in the appended claims.

What is claimed is:

l. A multi-sheet leaf construction comprisinga pair of outer sheets with substantiallyregistering edges, each of said sheets having along the edge a plurality of apertures with peripheral portions converging toward each other adjacent the edge of the sheet, a thin backing having a glue adhering propensity and being disposed between said sheets, at least in overlying relation to the apertures, and a binding strip wrapped around said outer sheet edges and over said apertures and having adhesive on the inner surface thereof securing the strip at least to the backing through said apertures, whereby to secure the outer sheets together and to the backing.

2. A multi-sheet leaf construction comprising a-pair of outer sheets of smooth and substantially non-porous material and having substantially registering edges, each of said sheets having along the edge thereof, a plurality of apertures with peripheral portions converging toward each other adjacent the edge of the sheet, a thin backing readily adherable to adhesive and being disposed between said sheets, at least in registering relation with the apertures, and a binding strip wrapped around said edges of the outer sheet and in overlying relation to the apertures, said binding strip having adhesive thereon and securing the strip to the outer sheets and to the backing through 4 the apertures, whereby the outer sheets areinterlockecl at the apertures with the backing to restrict relative movement thereof, as well as being adhesively secured to the binding strip.

3. A multi-sheet leaf construction comprising a pair of outer sheets with substantially registering edges, each of said sheets having along the edge, a plurality of apertures with peripheral portions converging toward each other adjacent the edge of the sheet, a fiexible'securing strip wrapped around the edges of said outer sheets and having opposite side portions each overlying the apertures in one of the outer sheets, and a securing media including adhesive in the apertures and connecting the opposite side portions of the binding strip together, whereby to provide interlocking connection between the outer sheets and the securing strip.

4. A multi-sheet leaf construction comprising a pair of outer sheets with substantially registering edges, each of said sheets having a plurality of apertures intersecting the edge, said apertures having enlarged inner portions spaced from the edge and also having convergent peripheral portions intersecting the edge and defining diminished outer neck portions of the apertures, a thin backing readily adherable to adhesive and being disposed between said sheets, at least in registration with the apertures in the edges thereof, and a binding strip wrapped around said edges of the outer sheets and having opposed side portions each overlying and covering the apertures in one of thesheets, adhesive on the inner surface of said bind ing strip and secured at least to the backing. through said apertures, whereby to secure, at least by interlocking, the

outer sheets with the backing and with the binding strip.

5. A multi-sheet leaf construction comprising. a pair of transparent acetate sheets to provide protective cover for displayed material, said acetate sheets having substantially registering inner edges, each of said sheets having along the inner edge, a plurality of apertures with pc- *ripheral portions converging toward each other adjacent the edge of the sheet, a thin backing readily adherable to adhesive and disposed between said transparent sheets in registration with the apertures, and a binding strip wrapped around said registered edges of the outer sheets and having an inner surface overlying the apertures therein, said surface having adhesive thereon and secured through the apertures to the backing, whereby to securely interlock the transparent acetate sheets with the binding stripand backing.

References Cited in the file of this patent UNITED STATES PATENTS 

